diff options
| -rw-r--r-- | arch/arm/mach-omap2/vc.c | 64 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/vc.h | 1 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/vc44xx_data.c | 2 |
3 files changed, 53 insertions, 14 deletions
diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c index 5d545632388d..f53d1f5acce1 100644 --- a/arch/arm/mach-omap2/vc.c +++ b/arch/arm/mach-omap2/vc.c @@ -19,17 +19,51 @@ #include "prm-regbits-44xx.h" #include "prm44xx.h" -/* - * Channel configuration bits, common for OMAP3 & 4 +/** + * struct omap_vc_channel_cfg - describe the cfg_channel bitfield + * @sa: bit for slave address + * @rav: bit for voltage configuration register + * @rac: bit for command configuration register + * @racen: enable bit for RAC + * @cmd: bit for command value set selection + * + * Channel configuration bits, common for OMAP3+ * OMAP3 register: PRM_VC_CH_CONF * OMAP4 register: PRM_VC_CFG_CHANNEL + * OMAP5 register: PRM_VC_SMPS_<voltdm>_CONFIG */ -#define CFG_CHANNEL_SA BIT(0) -#define CFG_CHANNEL_RAV BIT(1) -#define CFG_CHANNEL_RAC BIT(2) -#define CFG_CHANNEL_RACEN BIT(3) -#define CFG_CHANNEL_CMD BIT(4) -#define CFG_CHANNEL_MASK 0x3f +struct omap_vc_channel_cfg { + u8 sa; + u8 rav; + u8 rac; + u8 racen; + u8 cmd; +}; + +static struct omap_vc_channel_cfg vc_default_channel_cfg = { + .sa = BIT(0), + .rav = BIT(1), + .rac = BIT(2), + .racen = BIT(3), + .cmd = BIT(4), +}; + +/* + * On OMAP3+, all VC channels have the above default bitfield + * configuration, except the OMAP4 MPU channel. This appears + * to be a freak accident as every other VC channel has the + * default configuration, thus creating a mutant channel config. + */ +static struct omap_vc_channel_cfg vc_mutant_channel_cfg = { + .sa = BIT(0), + .rav = BIT(2), + .rac = BIT(3), + .racen = BIT(4), + .cmd = BIT(1), +}; + +static struct omap_vc_channel_cfg *vc_cfg_bits; +#define CFG_CHANNEL_MASK 0x1f /** * omap_vc_config_channel - configure VC channel to PMIC mappings @@ -56,7 +90,7 @@ static int omap_vc_config_channel(struct voltagedomain *voltdm) * All others must stay at zero (see function comment above.) */ if (vc->flags & OMAP_VC_CHANNEL_DEFAULT) - vc->cfg_channel &= CFG_CHANNEL_RACEN; + vc->cfg_channel &= vc_cfg_bits->racen; voltdm->rmw(CFG_CHANNEL_MASK << vc->cfg_channel_sa_shift, vc->cfg_channel << vc->cfg_channel_sa_shift, @@ -292,6 +326,10 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm) } vc->cfg_channel = 0; + if (vc->flags & OMAP_VC_CHANNEL_CFG_MUTANT) + vc_cfg_bits = &vc_mutant_channel_cfg; + else + vc_cfg_bits = &vc_default_channel_cfg; /* get PMIC/board specific settings */ vc->i2c_slave_addr = voltdm->pmic->i2c_slave_addr; @@ -303,7 +341,7 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm) voltdm->rmw(vc->smps_sa_mask, vc->i2c_slave_addr << __ffs(vc->smps_sa_mask), vc->common->smps_sa_reg); - vc->cfg_channel |= CFG_CHANNEL_SA; + vc->cfg_channel |= vc_cfg_bits->sa; /* * Configure the PMIC register addresses. @@ -311,13 +349,13 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm) voltdm->rmw(vc->smps_volra_mask, vc->volt_reg_addr << __ffs(vc->smps_volra_mask), vc->common->smps_volra_reg); - vc->cfg_channel |= CFG_CHANNEL_RAV; + vc->cfg_channel |= vc_cfg_bits->rav; if (vc->cmd_reg_addr) { voltdm->rmw(vc->smps_cmdra_mask, vc->cmd_reg_addr << __ffs(vc->smps_cmdra_mask), vc->common->smps_cmdra_reg); - vc->cfg_channel |= CFG_CHANNEL_RAC | CFG_CHANNEL_RACEN; + vc->cfg_channel |= vc_cfg_bits->rac | vc_cfg_bits->racen; } /* Set up the on, inactive, retention and off voltage */ @@ -330,7 +368,7 @@ void __init omap_vc_init_channel(struct voltagedomain *voltdm) (ret_vsel << vc->common->cmd_ret_shift) | (off_vsel << vc->common->cmd_off_shift)); voltdm->write(val, vc->cmdval_reg); - vc->cfg_channel |= CFG_CHANNEL_CMD; + vc->cfg_channel |= vc_cfg_bits->cmd; /* Channel configuration */ omap_vc_config_channel(voltdm); diff --git a/arch/arm/mach-omap2/vc.h b/arch/arm/mach-omap2/vc.h index c86301330b75..7ed70e07becf 100644 --- a/arch/arm/mach-omap2/vc.h +++ b/arch/arm/mach-omap2/vc.h @@ -66,6 +66,7 @@ struct omap_vc_common { /* omap_vc_channel.flags values */ #define OMAP_VC_CHANNEL_DEFAULT BIT(0) +#define OMAP_VC_CHANNEL_CFG_MUTANT BIT(1) /** * struct omap_vc_channel - VC per-instance data diff --git a/arch/arm/mach-omap2/vc44xx_data.c b/arch/arm/mach-omap2/vc44xx_data.c index 148be18397f8..0a4fc37877cc 100644 --- a/arch/arm/mach-omap2/vc44xx_data.c +++ b/arch/arm/mach-omap2/vc44xx_data.c @@ -52,7 +52,7 @@ static const struct omap_vc_common omap4_vc_common = { /* VC instance data for each controllable voltage line */ struct omap_vc_channel omap4_vc_mpu = { - .flags = OMAP_VC_CHANNEL_DEFAULT, + .flags = OMAP_VC_CHANNEL_DEFAULT | OMAP_VC_CHANNEL_CFG_MUTANT, .common = &omap4_vc_common, .cmdval_reg = OMAP4_PRM_VC_VAL_CMD_VDD_MPU_L_OFFSET, .smps_sa_mask = OMAP4430_SA_VDD_MPU_L_PRM_VC_SMPS_SA_MASK, |